Fire extinguisher



FIG. 1 is a front view for a fire extinguisher showing my new design;

FIG. 2 is a right side view thereof;

FIG. 3 is a rear side view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a top side view thereof; and,

FIG. 6 is a bottom side view.

CLAIM The ornamental design for a fire extinguisher, as shown anddescribed.